A very long straight wire of radius 'r carries current 'I'. Intensity of magnetic field 'B' at a point, lying at a perpendicular distance 'a' from the axis is `propto` ___________

A very long straight wire of radius r carries current I. Intensity of magnetic field B at point lying at a perpendicular distance 'a' from the axis is alpha ______ . (where altr )

a long straight wire carries a current of 35 A . what is the magnitude of magnetic field B at a point 20 cm from the wire.

A very long straight wire carries a current 5.2A. What is the magnitude of the magnetic field at a distance 3.1 cm from the wire?

A long straight wire carries a current of 35A . What is the magnetic of the field vecB at a point 20cm from the wire?

An extremely long straight wire, with radius of cross-section a, carries current I. Then ratio of magnetic fields at distances a/2 and 2a from its axis would be ______ .

The magnitude of magnetic field at a point having perpendicular distance 50 mm from a long straight conducting wire carrying a current of 3A is

Figure shows a straight wire of length a carrying a current I . What is the magnitude of magnetic field induction produced by the current at P, which is lying at a perpendicular distance a from one end of the wire.

Figure shows a straight wire of length a carrying a current I . What is the magnitude of magnetic field induction produced by the current at P, which is lying at a perpendicular distance a from one end of the wire.

A current of 2 amp. flows in a long, straight wire of radius 2 mm . The intensity of magnetic field on the axis of the wire is